多芯光网络多维串扰感知资源分配方法

Multidimensional Crosstalk Perception Routing and Spectrum Allocation in Space-Division-Multiplexing Elastic Optical Networks

为解决空分复用弹性光网络的生存性需求不足的问题,提出了一种基于多维串扰感知的路由和频谱分配方法。首先,构建了包含邻接串扰度和限带串扰度的串扰度评价模型,这2种串扰度与频谱资源占用度构成多维串扰度;然后,通过实时感知链路上的串扰度,更新光纤链路的代价矩阵,从而使分配后光纤链路间的串扰最小。同时,通过感知较小阻塞的位置进行频谱分配,旨在提升资源利用率并降低阻塞率。实验结果显示,与传统方案相比,所提方法显著降低了串扰率,提高了网络的生存性和资源利用率。

Aiming at the survivability requirements of space division multiplexing elastic optical networks,a multidimensional crosstalk-aware routing and spectrum allocation scheme has been proposed.Firstly,it establishes a crosstalk evaluation model,including adjacent crosstalk and band-limited crosstalk,and combine them with spectrum resource occupancy to form a comprehensive crosstalk model.Secondly,it updates the cost matrix of the fiber link by sensing the comprehensive crosstalk on the link in real time,so as to minimize the crosstalk between the allocated fiber links.At the same time,it detects the location that causes less blocking to perform spectrum allocation,so as to realize the decrease of network blocking probability and the increase of network resource utilization.Simulation results show that compared with the traditional scheme,this work significantly lower crosstalk,improves network survivability,and improves performance such as network blocking probability and network resource utilization.